A laser displacement sensor integrating a diffusing lens and a filter
By installing a diffusion lens at the transmitter and a filter at the receiver of the laser displacement sensor, the problems of no response and signal crosstalk in the measurement of high reflectivity surfaces are solved, and reliable and accurate measurement is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWESTERN POLYTECHNICAL UNIV
- Filing Date
- 2025-07-31
- Publication Date
- 2026-05-26
Smart Images
Figure CN224285824U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photoelectric measurement, and more particularly to a laser displacement sensor that integrates a diffusion lens and a filter. Background Technology
[0002] In the field of optical displacement measurement technology, laser displacement sensors are widely used in industrial inspection scenarios due to their non-contact and high-precision characteristics. However, when the target being measured is a highly reflective surface such as metal, the laser beam emitted by the sensor undergoes specular reflection on the highly reflective surface. This prevents the reflected light from effectively entering the receiving area of the light-receiving element, leading to signal loss or abnormal measurement results. The tilt of the target often further exacerbates this adverse effect. In addition, when sensors are used in combination, adjacent sensors may mistakenly receive signals from neighboring sensors, resulting in crosstalk errors. Utility Model Content
[0003] The main objective of this application is to provide a laser displacement sensor that integrates a diffusion lens and a filter, aiming to solve the problem that existing laser displacement sensors are prone to failure when measuring high reflectivity targets.
[0004] To achieve the above objectives, this application provides a laser displacement sensor integrating a diffusion lens and a filter, comprising: a housing body, inside which a sensor body, a first slot, and a second slot are disposed; a diffusion lens is disposed in the first slot and located at the emission window of the sensor body; a filter is disposed in the second slot and located at the receiving window of the sensor body; wherein, the first slot includes a first base plate, on which two first side plates are vertically fixed, each first side plate having a first through hole; the two sides of the diffusion lens respectively extend into the two first through holes; the second slot includes a second base plate, on which two second side plates are vertically fixed, each second side plate having a second through hole; the two sides of the filter respectively extend into the two second through holes.
[0005] Optionally, the main body of the outer casing includes a lower casing and a cover. The adjacent side walls of the lower casing are respectively provided with observation windows and light transceiver windows, and the diffuser lens and the filter are parallel to the light transceiver windows.
[0006] Optionally, a positioning post adapted to the positioning hole of the sensor body is provided inside the lower housing, and the positioning post passes through the positioning hole.
[0007] Optionally, a connecting post is provided inside the lower housing, with a groove at the free end of the connecting post, and a through hole adapted to the connecting post is provided on the cover. The groove and the through hole communicate with each other and are connected by fasteners.
[0008] Optionally, the connection between the other two adjacent side walls of the lower housing forms an inclined surface, and a wire hole adapted to the wire of the sensor body is provided on the inclined surface.
[0009] Optionally, a guide member is provided on the outer side wall of the lower housing, and the cross-sectional shape of the guide member is T-shaped.
[0010] Optionally, the free ends of the two first side plates are connected through the first top plate, and the free ends of the two second side plates are connected through the second top plate.
[0011] Optionally, the first base plate is linear in shape and is fixed inside the housing body by two fasteners, with the first side plate located between the two fasteners.
[0012] Optionally, the second base plate is L-shaped and is fixed inside the outer casing by fasteners located at both ends of the second base plate.
[0013] Compared with the prior art, the beneficial effects of this application are as follows:
[0014] This invention relates to a laser displacement sensor integrating a diffusion lens and a filter. By fixing a diffusion lens in front of the laser displacement sensor's emitting end, it solves the problem of non-response failure when used on tilted or highly reflective surfaces. By fixing a filter in front of the laser displacement sensor's receiving end, it avoids false responses caused by crosstalk between signals from adjacent laser displacement sensors. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a laser displacement sensor integrating a diffusion lens and a filter according to this application;
[0016] Figure 2 This is an exploded view of a laser displacement sensor integrating a diffusion lens and a filter according to this application;
[0017] Figure 3 This is a side view of a laser displacement sensor integrating a diffusion lens and a filter according to this application.
[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] The first embodiment of this utility model provides a laser displacement sensor integrating a diffusion lens and a filter, such as... Figure 1-3 As shown, the device includes: a main body 1, inside which a sensor body 2, a first slot 3, and a second slot 4 are disposed; a diffusion lens 5 is disposed in the first slot 3, located at the emission window of the sensor body 2; a filter 6 is disposed in the second slot 4, located at the receiving window of the sensor body 2; wherein, the first slot 3 includes a first base plate 31, on which two first side plates 32 are vertically fixed, each first side plate 32 having a first through hole 33; the diffusion lens 5 extends into the two first through holes 33 on both sides respectively; the second slot 4 includes a second base plate 41, on which two second side plates 42 are vertically fixed, each second side plate 42 having a second through hole 43; the filter 6 extends into the two second through holes 43 on both sides respectively. Furthermore, the free ends of the two first side plates 32 are connected through a first top plate 34, and the free ends of the two second side plates 42 are connected through a second top plate 44, further clamping and protecting the diffusion lens 5 and the filter 6.
[0021] It is worth noting that the diffusion lens 5 and filter 6 with different optical parameters and sizes can be replaced as needed, and the sizes of the first slot 3 and the second slot 4 can be adjusted accordingly.
[0022] In this embodiment, the diffusion lens 5 is fixed to the emission window of the sensor body 2 via the first slot 3, which diffuses the laser beam and expands the coverage area of the reflected laser beam. This allows the sensor's receiving end to receive the signal and achieve normal measurement, solving the problem of insufficient reliability of existing laser displacement sensors when used on tilted or highly reflective surfaces. The laser beam is amplified by the diffusion lens 5, which may affect adjacent sensors. Therefore, the filter 6 is fixed to the receiving window of the sensor body 2 via the second slot 4, which limits the energy of the laser beam entering adjacent sensors, ensuring that the energy is below the response threshold of the adjacent sensors, thereby overcoming the effects of multi-sensor crosstalk.
[0023] Specifically, the outer casing 1 includes a lower casing 101 and a cover 102. The lower casing 101 has observation windows 103 and light transceiver windows 104 on its adjacent side walls. The diffuser lens 5 and the filter 6 are parallel to the light transceiver windows 104. The observation window 103 corresponds to the window on the sensor body 2 and is used to observe the response state of the sensor body 2. The light transceiver window 104 is used to receive the laser light emitted and reflected from the transmitter of the sensor body 2.
[0024] Furthermore, the lower housing 101 is provided with a positioning post 7 that matches the positioning hole of the sensor body 2, and the positioning post 7 passes through the positioning hole. This is used to fix the laser displacement sensor and ensure its stability during measurement. The lower housing 101 is provided with a connecting post 8, the free end of which has a groove. The cover 102 has a through hole 9, which communicates with the groove and is connected by fasteners, thereby connecting the lower housing 101 and the cover 102. The connection between the other two adjacent sidewalls of the lower housing 101 forms an inclined surface, and a wire hole 10 that matches the wires of the sensor body 2 is provided on the inclined surface.
[0025] Furthermore, a guide member 11 is provided on the outer wall of the lower housing 101, and the cross-sectional shape of the guide member 11 is T-shaped. By connecting the laser displacement sensor of this embodiment to the platform or guide rail through the guide member 11, positioning or movement can be achieved.
[0026] The first base plate 31 is linear in shape and is fixed inside the outer shell 1 by two fasteners. The first side plate 32 is located between the two fasteners. The second base plate 41 is L-shaped and is fixed inside the outer shell 1 by fasteners located at both ends of the second base plate 41. Both the first base plate 31 and the second base plate 41 have screw holes 102 that are compatible with the fasteners. The fasteners can be screws, which are used to fix the first base plate 31 and the second base plate 41 inside the lower shell 101.
[0027] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A laser displacement sensor integrating a diffused lens and a filter, characterized by, include: The outer casing contains a sensor body, a first slot, and a second slot. A diffusion lens is provided in the first slot, and the diffusion lens is located at the emission window of the sensor body; a filter is provided in the second slot, and the filter is located at the receiving window of the sensor body. The first slot includes a first base plate, on which two first side plates are vertically fixed, and each first side plate has a first through hole; the diffuser lens extends into the two first through holes on both sides respectively; The second slot includes a second base plate, on which two second side plates are vertically fixed, and each second side plate has a second through hole; the two sides of the filter extend into the two second through holes respectively.
2. The integrated diffuser lens and filter laser displacement sensor of claim 1, wherein, The main body of the outer shell includes a lower shell and a cover. The adjacent side walls of the lower shell are respectively provided with observation windows and light transceiver windows. The diffusion lens and the filter are parallel to the light transceiver windows.
3. The laser displacement sensor integrated with a diffused lens and a filter according to claim 2, wherein The lower housing is provided with a positioning post that matches the positioning hole of the sensor body, and the positioning post passes through the positioning hole.
4. The laser displacement sensor integrating a diffusion lens and a filter according to claim 2, characterized in that, The lower housing is provided with a connecting post, the free end of which has a groove. The cover is provided with a through hole that matches the connecting post. The groove and the through hole are connected by fasteners.
5. The laser displacement sensor integrating a diffusion lens and a filter according to claim 2, characterized in that, The connection between the other two adjacent side walls of the lower housing forms an inclined surface, and a wire hole adapted to the wire of the sensor body is provided on the inclined surface.
6. The laser displacement sensor integrating a diffusion lens and a filter according to claim 2, characterized in that, A guide member is provided on the outer side wall of the lower housing, and the cross-sectional shape of the guide member is T-shaped.
7. The laser displacement sensor integrating a diffusion lens and a filter according to claim 1, characterized in that, The two free ends of the first side plates are connected by the first top plate, and the two free ends of the second side plates are connected by the second top plate.
8. The laser displacement sensor integrating a diffusion lens and a filter according to claim 1, characterized in that, The first base plate is linear in shape and is fixed inside the outer shell body by two fasteners. The first side plate is located between the two fasteners.
9. The laser displacement sensor integrating a diffusion lens and a filter according to claim 1, characterized in that, The second base plate is L-shaped and is fixed inside the outer shell body by fasteners located at both ends of the second base plate.